On footmercato.net, advertising and tracking add ≈ 529 g CO₂ per million pageviews (450 g from ad-serving alone) — 0.1× the index average, cleaner than 70% of the sites we measure.
Ad-relevant
529
g CO₂ / 1M pageviews
Ad-serving only
450
g CO₂ / 1M pageviews
6
kg CO₂ / year at 1M pageviews per month
70
% cleaner than the DACH index
15
% of the footprint is tracking overhead, not ad-serving
Measured on the live electricity grid from public page-load data — an estimate of a site's ad-tech architecture, not a measured campaign figure. See the methodology →